feat(dimensions): PR10 advanced — custom dimensions, hierarchy, account rules, commit enforcement (#886)

* feat(dimensions): PR10 advanced — custom dimensions, hierarchy, account rules, commit enforcement

The final rung of the dimensions ladder
(dev_docs/dimensions_implementation_plan.md §7 row 10):

- custom dimensions: POST /api/dimensions creates registry dims (next free
  SIE number >= 20 when omitted; explicit numbers allowed — SIE import
  already mints reserved ones); register gets a 'Ny dimension' dialog with
  a quiet Avancerat disclosure for the #UNDERDIM parent; GET now carries
  parent_sie_dim_no (the column + SIE round-trip existed since PR1/PR5 —
  this exposes it)
- account_dimension_rules (migration 20260703120000): one rule per
  (account, dimension) — required / default / fixed, per-rule is_active,
  company-scoped RLS, composite FK to the registry, value-presence CHECK
- enforcement, opt-in BY CONSTRUCTION (zero rules = engine byte-identical;
  deliberately NO settings toggle — a rule that exists but is ignored is
  worse than either extreme): default/fixed apply onto line bags at draft
  creation (fixed overwrites, default fills); required asserts at
  commitEntry with a Swedish MANDATORY_DIMENSION_MISSING naming every
  account + dimension; the bulk-book route runs the same policy before its
  RPC; storno/correction paths never pass through commitEntry so history
  always reverses regardless of policy; rule fetches fail open incl.
  thrown exceptions
- chart of accounts: per-account Dimensionsregler section in
  EditAccountDialog (Krävs/Förval/Låst, value picker, pause switch),
  gated on the existing dimensions toggle, quiet when empty
- pickers: LineDimensionFields is registry-driven (one combobox per active
  dimension, cached fetch, hardcoded 1/6 fallback) — every existing mount
  lights up custom dims with zero changes
- agent briefing: per-dimension required_on_accounts/default_on_accounts
  so agents self-correct instead of bouncing off the policy error
- rules CRUD API with existence/active/company validation and qualified
  DTO ids; firm_id FK deferred until the firms table lands (per plan)

39 new tests (pure-fn rules, engine enforcement, both new API surfaces,
pg-real RLS/CHECK/cascade suite); full suite 6,791 green; migration
replayed on a fresh container.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix: renumber migration to 20260703200000 — version collision with prod

The concurrent session shipped pending_operations_add_link_document_to_voucher
as 20260703120000 today; the Supabase preview branch (cloned from prod)
rejected the duplicate version key.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix: review round — auto-pick retry on collision, fail-open warnings, query schema

- POST /api/dimensions retries once past a concurrent number claim when the
  number was auto-picked (explicit choices still 409)
- every fail-open skip of the dimension-rules policy now logs a structured
  warning (engine draft/commit paths + bulk-book) — deliberate fail-open,
  but observable
- GET /api/dimensions/rules validates its query through
  ListDimensionRulesQuerySchema instead of an inline regex

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

messages/en.json

@@ -3477,7 +3477,21 @@
     "settings_imported_toast": "{count, plural, one {1 existing code was imported} other {# existing codes were imported}}",
     "settings_import_failed_title": "Could not import existing codes",
     "settings_save_failed_title": "Could not save the setting",
-    "settings_open_register": "Open cost centres & projects"
+    "settings_open_register": "Open cost centres & projects",
+    "new_dimension": "New dimension",
+    "new_dimension_title": "New dimension",
+    "dim_form_name_invalid": "Enter a name (1–60 characters).",
+    "dim_form_number_label": "Number",
+    "dim_form_number_help": "Leave empty for the next free number (20+). SIE reserves 1–19.",
+    "dim_form_number_invalid": "Enter a whole number of 20 or higher.",
+    "dim_form_resets_label": "Resets every fiscal year",
+    "dim_form_resets_help": "Balances per value start over at a new fiscal year.",
+    "dim_form_advanced": "Advanced",
+    "dim_form_parent_label": "Parent dimension",
+    "dim_form_parent_none": "None",
+    "dim_form_parent_help": "Makes the new dimension a subdimension (SIE #UNDERDIM) of the selected one.",
+    "dim_created_title": "Dimension created",
+    "subdimension_of": "Subdimension of {parent}"
   },
   "tic_workspace": {
     "toast_settings_failed": "Could not fetch settings",

messages/sv.json

@@ -3477,7 +3477,21 @@
     "settings_imported_toast": "{count, plural, one {1 befintlig kod importerades} other {# befintliga koder importerades}}",
     "settings_import_failed_title": "Kunde inte importera befintliga koder",
     "settings_save_failed_title": "Kunde inte spara inställningen",
-    "settings_open_register": "Öppna kostnadsställen & projekt"
+    "settings_open_register": "Öppna kostnadsställen & projekt",
+    "new_dimension": "Ny dimension",
+    "new_dimension_title": "Ny dimension",
+    "dim_form_name_invalid": "Ange ett namn (1–60 tecken).",
+    "dim_form_number_label": "Nummer",
+    "dim_form_number_help": "Lämna tomt för nästa lediga (20+). SIE reserverar 1–19.",
+    "dim_form_number_invalid": "Ange ett heltal, 20 eller högre.",
+    "dim_form_resets_label": "Nollställs varje räkenskapsår",
+    "dim_form_resets_help": "Saldon per värde börjar om vid nytt räkenskapsår.",
+    "dim_form_advanced": "Avancerat",
+    "dim_form_parent_label": "Överordnad dimension",
+    "dim_form_parent_none": "Ingen",
+    "dim_form_parent_help": "Gör den nya dimensionen till en underdimension (SIE #UNDERDIM) av den valda.",
+    "dim_created_title": "Dimension skapad",
+    "subdimension_of": "Underdimension till {parent}"
   },
   "tic_workspace": {
     "toast_settings_failed": "Kunde inte hämta inställningar",